diff --git a/doc/changelog.d/2070.test.md b/doc/changelog.d/2070.test.md
new file mode 100644
index 0000000000..9667bec3a9
--- /dev/null
+++ b/doc/changelog.d/2070.test.md
@@ -0,0 +1 @@
+Adding test coverage for designer, sketch, misc
\ No newline at end of file
diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
index 9e24cd9e53..c6cad77fa4 100644
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@@ -204,3 +204,14 @@ def use_service_colors():
 
     # Code here runs after the test, reverting the state
     pyansys_geometry.USE_SERVICE_COLORS = False
+
+
+@pytest.fixture(scope="function")
+def use_grpc_client_old_backend(modeler: Modeler):
+    currentbackend = modeler._grpc_client._backend_version
+    modeler._grpc_client._backend_version = (24, 2, 0)
+
+    yield  # This allows the test to run
+
+    # Code here runs after the test, reverting the state
+    modeler._grpc_client._backend_version = currentbackend
diff --git a/tests/integration/files/25R1BasicBoxNameSelection.scdocx b/tests/integration/files/25R1BasicBoxNameSelection.scdocx
new file mode 100644
index 0000000000..77e3f68fd8
Binary files /dev/null and b/tests/integration/files/25R1BasicBoxNameSelection.scdocx differ
diff --git a/tests/integration/test_design.py b/tests/integration/test_design.py
index 1e7220a0e5..80a901cf42 100644
--- a/tests/integration/test_design.py
+++ b/tests/integration/test_design.py
@@ -22,6 +22,7 @@
 """Test design interaction."""
 
 import os
+from pathlib import Path
 
 import matplotlib.colors as mcolors
 import numpy as np
@@ -40,7 +41,7 @@
 from ansys.geometry.core.designer.body import CollisionType, FillStyle, MasterBody
 from ansys.geometry.core.designer.face import FaceLoopType
 from ansys.geometry.core.designer.part import MasterComponent, Part
-from ansys.geometry.core.errors import GeometryExitedError
+from ansys.geometry.core.errors import GeometryExitedError, GeometryRuntimeError
 from ansys.geometry.core.materials import Material, MaterialProperty, MaterialPropertyType
 from ansys.geometry.core.math import (
     IDENTITY_MATRIX44,
@@ -54,7 +55,7 @@
     UnitVector3D,
     Vector3D,
 )
-from ansys.geometry.core.misc import DEFAULT_UNITS, UNITS, Accuracy, Angle, Distance
+from ansys.geometry.core.misc import DEFAULT_UNITS, UNITS, Accuracy, Angle, Distance, checks
 from ansys.geometry.core.misc.auxiliary import DEFAULT_COLOR
 from ansys.geometry.core.parameters.parameter import ParameterType, ParameterUpdateStatus
 from ansys.geometry.core.shapes import (
@@ -77,6 +78,20 @@
 from .conftest import FILES_DIR
 
 
+def test_design_is_close(modeler: Modeler):
+    # Testing to see if design is closed and whether more operations can be performed on it
+    sketch = Sketch()
+    sketch.box(Point2D([0, 0]), 10, 10)
+    design = modeler.create_design("Box")
+    design.extrude_sketch("Box", sketch, 2)
+    design.close()
+    with pytest.raises(
+        GeometryRuntimeError,
+        match="The design has been closed on the backend. Cannot perform any operations on it.",
+    ):
+        checks.ensure_design_is_active(design.bodies[0].edges)
+
+
 def test_design_selection(modeler: Modeler):
     """Test to validate the designer selection for edges and __repr__ method."""
     sketch = Sketch()
@@ -490,6 +505,13 @@ def test_named_selections(modeler: Modeler):
     assert len(design.named_selections) == 3
 
 
+def test_old_backend_version(modeler: Modeler, use_grpc_client_old_backend: Modeler):
+    # Try to vefify name selection using earlier backend version
+    design = modeler.open_file(Path(FILES_DIR, "25R1BasicBoxNameSelection.scdocx"))
+    hello = design.named_selections
+    assert hello[0].faces == []
+
+
 def test_empty_named_selection(modeler: Modeler):
     """Test for verifying the creation of an empty ``NamedSelection``."""
     # Create your design on the server side
diff --git a/tests/test_misc_checks.py b/tests/test_misc_checks.py
index 0f690418f1..6715aca587 100644
--- a/tests/test_misc_checks.py
+++ b/tests/test_misc_checks.py
@@ -29,6 +29,8 @@
 from ansys.geometry.core.math import Point3D
 from ansys.geometry.core.misc import (
     UNITS,
+    TessellationOptions,
+    auxiliary,
     check_is_float_int,
     check_ndarray_is_float_int,
     check_ndarray_is_non_zero,
@@ -42,6 +44,44 @@
 )
 
 
+def test_tessellation_options():
+    # Testing tessellation options
+    tessellation_options = TessellationOptions(
+        surface_deviation=0.01,
+        angle_deviation=0.1,
+        max_aspect_ratio=2.0,
+        max_edge_length=5.0,
+        watertight=True,
+    )
+    assert tessellation_options.surface_deviation == 0.01
+    assert tessellation_options.angle_deviation == 0.1
+    assert tessellation_options.max_aspect_ratio == 2.0
+    assert tessellation_options.max_edge_length == 5.0
+    assert tessellation_options.watertight is True
+
+
+def test_misc_checks():
+    # Testing backend_version_decorator for log warning
+    @min_backend_version(25, 2, 0)
+    def fake_temp_operation(obj):
+        print("Performing operation...")
+
+    invalid_object = {"key": "value"}
+    fake_temp_operation(invalid_object)
+
+
+def test_check_auxiliary():
+    """Test the auxiliary functions for checking color conversion."""
+    with pytest.raises(ValueError, match="RGB values in the 0-1 range must be floats."):
+        auxiliary.convert_color_to_hex(tuple([0, 1, 0]))
+    with pytest.raises(ValueError, match="RGB values in the 0-255 range must be integers."):
+        auxiliary.convert_color_to_hex(tuple([1.1, 1.1, 1.1, 1.1]))
+    with pytest.raises(ValueError, match="RGB tuple contains mixed ranges or invalid values."):
+        auxiliary.convert_color_to_hex(tuple([256, 11, 1.1]))
+    with pytest.raises(ValueError, match="Invalid color value:."):
+        auxiliary.convert_color_to_hex((125, 128))
+
+
 def test_check_type():
     """Test that the __eq__ check is working properly.
 
diff --git a/tests/test_misc_measurements.py b/tests/test_misc_measurements.py
index fb398da11d..c96478e2ca 100644
--- a/tests/test_misc_measurements.py
+++ b/tests/test_misc_measurements.py
@@ -23,7 +23,13 @@
 from pint import Quantity
 import pytest
 
-from ansys.geometry.core.misc import DEFAULT_UNITS, UNITS, Angle, Distance
+from ansys.geometry.core.misc import DEFAULT_UNITS, UNITS, Angle, Distance, measurements
+
+
+def test_repr_():
+    # Testing the __repr__ method of the Measurement class
+    mea = measurements.Measurement(5.0, DEFAULT_UNITS.LENGTH, DEFAULT_UNITS.LENGTH)
+    assert measurements.Measurement.__repr__(mea) == "5.0 meter"
 
 
 def test_distance():
diff --git a/tests/test_sketch.py b/tests/test_sketch.py
index 2b1d7f1313..ae3c33c9af 100644
--- a/tests/test_sketch.py
+++ b/tests/test_sketch.py
@@ -43,6 +43,7 @@
     SketchCircle,
     SketchEdge,
     SketchEllipse,
+    SketchFace,
     SketchSegment,
     Slot,
     SpurGear,
@@ -122,8 +123,11 @@ def test_sketch_circle_plane_change():
     assert circle.dir_z == Vector3D([0, -1, 0])
 
 
+@pytest.mark.skipif(
+    not are_graphics_available(), reason="Skipping due to graphics requirements missing"
+)
 def test_sketch_face():
-    """Test the sketch face perimeter and change plane functionality"""
+    """Test the sketch face perimeter, change plane, and visualization polydata functionality"""
     sketch = Sketch()
     per = Triangle(Point2D([10, 10]), Point2D([2, 1]), Point2D([10, -10])).perimeter
     assert abs((per - 45.64306508752774 * UNITS.m).m) <= 5e-14
@@ -134,6 +138,18 @@ def test_sketch_face():
     )
     sketch.faces[0].plane_change(new_plane)
 
+    start_point = Point2D([0, 0], unit=UNITS.meter)
+    end_point = Point2D([5, 5], unit=UNITS.kilometer)
+    segment1 = SketchSegment(start_point, end_point)
+    sketch1 = SketchFace()
+    sketch1._edges = [segment1]
+    polyda = sketch1.visualization_polydata
+    assert polyda.center == pytest.approx(
+        ([2500.0, 2500.0, 0.0]),
+        rel=1e-7,
+        abs=1e-8,
+    )
+
 
 def test_sketch_edge():
     """Test the sketch edge functionality"""